Let me help some of you with understanding color temperature. K refers to the Kelvin scale of light temperature.
3200* is the temp. tungsten burns. It is on the warmer side if the scale like the tungsten halogen bulbs in your house or older cars headlights. It's what we are all used to seeing all the time.
5600* is the color temp. of natural outdoor daylight. It is a cool light or has a blue tint to it. For example, any light coming in from a window to the outside during the day will be 5600*.
4300* is simply in the middle of the two for simplest explanations. So it isn't too warm or too cool of a light.
6000* is a bit cooler than daylight. More like a moon lit night.
In general, HID bulbs give off more lumens than tungsten using the same wattage. So therefore, things appear brighter with the HID bulbs. I hope I helped clear things up.